If you work for an office and have to take an escalator, try to use stairs instead, although it is tempting to use the escalator since it is there but I have seen many people who despite the escalators use the stairs since they think that it is a good form of free exercise which is really. Another form of exercise not used that frequently but still used is carrying your grocery from your car to your house and also folding clothes after a wash is also a good exercise. Cleaning dishes to put it in the dishwasher is another form of free exercise. Even after the dishes are cleaned putting it back in their places is also exercise.
I am sure anything which you do in a routine manner may or may not be considered exercise enough to lower your cholesterol but collectively it is free exercise. You may not think of driving as part of exercise but even accelerating your vehicle and putting on brakes now and then is a short of that. Typing on a computer even while sitting is yet another one that people may not think of part of their routine exercise. One more I can come up with is washing hands and face and even taking shower is also exercise. So even if you don’t want to spend money or don’t have the time to go to a gym, the above mentioned activities if done on a regular basis can give you enough exercise to keep you healthy.